| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 353.68 | USD | 20251211 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.21 | USD | 20251210 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.11 | USD | 20251209 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.16 | USD | 20251208 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.23 | USD | 20251207 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.23 | USD | 20251205 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.3 | USD | 20251204 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.2 | USD | 20251203 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.01 | USD | 20251202 |
| Shandong Yihe Fine Chemical Co., Ltd. | China national standards | MT | 339.18 | USD | 20251201 |